If the Standard Deviation of the Lifetime of a Vacuum

question 119

Short Answer

If the standard deviation of the lifetime of a vacuum cleaner is estimated to be 300 hours, how large of a sample must be taken in order to be 97% confident that the margin of error will not exceed 40 hours?

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Definitions:

Inoculation

A process to stimulate the body's immune response through the administration of a vaccine.

Fast Talkers

Individuals who speak at a rapid pace, often in an attempt to persuade or overwhelm others without giving them time to think critically.

Peripheral Route

A mode of persuasion in which an individual is influenced by superficial cues or aspects rather than the central, argumentative content of a message.

Central Route

A persuasive communication strategy that focuses on logical arguments and high-quality information to influence beliefs, attitudes, and behaviors.